Summery insouciance夏季的轻松
insouciance E漫不经心
insouciance ŵ漠不关心
insouciance n漠不关心
inadvertence insouciance slip over unconcern漫不经心
N-UNCOUNT（不可数名词） Insouciance is lack of concern shown by someone about something that they are expected to take more seriously. 漫不经心 [正式]
He replied with characteristic insouciance: "So what?"
他用特有的漫不经心的口吻答道：“那又怎么样？”